Interestingly, a reference laboratory experience of clinically achievable voriconazole bloodstream concentrations in a large number of subjects (n = 14,370) showed that 50.6% of samples were within the recommended trough range [ 77].
Often in cases of human preterm birth, the gas exchange tissues are underdeveloped and in order to provide an adequate amount of oxygen in the bloodstream, oxygen concentration in the respired air must be increased, leading to bronchopulmonary dysplasia (BPD).
SAA5 (now designated as mouse SAA4, and equivalent to SAA4 in humans) is expressed in the livers of uninfected mice and humans and secreted into the bloodstream at concentrations of ∼50 ug/ml.
The authors note that peptidoglycan can be translocated to the bloodstream, with concentrations at similar levels to those in faeces, indicating that there is constant peptidoglycan turnover among the microbiota and that immune stimulation by the microbiota can affect sites distal from the GI tract.
Internally generated MAs III) then flows out of the hepatocyte and into the bloodstream down its concentration gradient via AQP9.
This enables macromolecules to reach tumor cells from the bloodstream in higher concentration than in normal tissues.
LPS produced in the gastrointestinal tract can be translocated into the bloodstream, thus the concentration of peripheral blood LPS increases [ 14],[ 23].
Endotoxin produced in the digestive tract can be translocated into the bloodstream, thus the concentration of blood LPS increases [ 4, 17].
As a chemical is distributed to the tissues by the bloodstream, the chemical concentrations in the well-perfused organs rapidly reach a steady state with the blood concentration while the concentrations of the chemical in the poorly perfused tissue lag behind.
Drugs with long terminal elimination half-lives will be present in the bloodstream at subtherapeutic concentrations for longer than rapidly eliminated drugs and will therefore provide a more powerful force for the spread of drug-resistant parasites [ 12, 31, 32].
